.app{
	width: 100%;
	height: 100vh;
	background-color: #ffffff;
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
}
.card54{
	width: 100px;
	height: 46px;
	cursor: pointer;
	box-sizing: border-box;
	font-weight: 800;
	letter-spacing: 2px;
	color: #ffffff;
}
.card54::before,.card54::after{
	width: 100px;
	height: 46px;
	border-radius: 9px;
	border: 1px dashed #ffffff;
	display: flex;
	align-items: center;
	justify-content: center;
	position: absolute;
	content: '有彩蛋';
	background-color: #36AFCA;
	box-shadow: 0 0 0 4px #36AFCA;
	transition: transform 0.3s linear;
	backface-visibility: hidden;
}
.card54::after{
	content: '叫爸爸';
	background-color: #F89C6B;
	box-shadow: 0 0 0 4px #F89C6B;
	transform: rotateY(180deg);
}
.card54:hover::before{
	transform: rotateY(180deg);
}
.card54:hover::after{
	transform: rotateY(0deg);
}
